Statistical study of the effect of various machining parameters on delamination in drilling of carbon fiber reinforced composites

نویسندگان [English]

Saeed Amini1؛ Mohammad Baraheni2؛ Morteza Moeini Afzal3

1- Department of Manufacturing, Faculty of Mechanic, University of Kashan, Kashan, Iran

2- Department of Manufacturing, Faculty of Mechanic, University of Kashan, Kashan, Iran

3Department of Manufacturing, Faculty of Mechanic, University of Allame Naeini, Naein, Iran

چکیده [English]

Carbon fiber reinforced composites because of suitable mechanical and physical properties are used in numerous industrial applications. Drilling is a common method to connect fiber reinforced material structures. Fiber reinforced composite laminates in machining operations, especially in drilling which is subjected to stress concentration, tend to be delaminated. Delamination phenomena is extremely under the influence of factors like tool and workpiece geometry and material as well as machining parameters. In this research, by using Taguchi experiment design method, an experimental study conducted on drilling of carbon fiber reinforced composite with tungsten carbide tool to investigate amount of delamination. Discussed parameters include predrilling, rotational speed, feed rate, tool diameter and workpiece thickness. According to conducted experiments, observed that predrilling, rotational speed increment and feed rate decrement cause delamination damage reduction and hole quality improvement. Also using drilling tool with smaller diameter and utilization of thinner composite cause delamination reduction. As for achieved results, in Minitab software, Analysis of Variance(ANOVA) carried out to examine hole quality and effectiveness of each parameter. Among examined parameters, workpiece thickness has the most effect on the amount of delamination. Optimized parameters to reduce the delamination also obtained.